Three/ Four Pole Type Indoor Isolator is made quality grade raw material which ensures optimum durability along with long lasting trouble free service. The Indoor Isolator assures making or breaking on load and security breaking of any low voltage electrical circuit. The Indoor Isolator comes in 4/ 3 pole 150a/ 250a/ 630a manual operation. Three/ Four Pole Type Indoor Isolator is strong and rigid in construction and requires minimal maintenance.